DSPIC30F6011A-20E/PT Microchip Technology, DSPIC30F6011A-20E/PT Datasheet - Page 142
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DSPIC30F6011A-20E/PT
Manufacturer Part Number
DSPIC30F6011A-20E/PT
Description
Digital Signal Processor
Manufacturer
Microchip Technology
Series
dsPIC™ 30Fr
Datasheets
1.DSPIC30F2011-20ISO.pdf
(66 pages)
2.DSPIC30F2011-20IP.pdf
(26 pages)
3.DSPIC30F5011-20IPT.pdf
(220 pages)
4.DSPIC30F6011A-30IPT.pdf
(234 pages)
5.DSPIC30F6011A-30IPT.pdf
(8 pages)
6.DSPIC30F6011A-30IPT.pdf
(10 pages)
7.DSPIC30F6011A-30IPT.pdf
(6 pages)
8.DSPIC30F6011A-30IPT.pdf
(8 pages)
9.DSPIC30F6011A-30IPT.pdf
(16 pages)
Specifications of DSPIC30F6011A-20E/PT
Core Processor
dsPIC
Core Size
16-Bit
Speed
20 MIPS
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
52
Program Memory Size
132KB (44K x 24)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
6K x 8
Voltage - Supply (vcc/vdd)
2.5 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
64-TFQFP
Package
64TQFP
Device Core
dsPIC
Family Name
dsPIC30
Maximum Speed
20 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
16 Bit
Number Of Programmable I/os
52
Interface Type
CAN/I2C/SPI/UART
On-chip Adc
16-chx12-bit
Number Of Timers
5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC30F008 - MODULE SKT FOR DSPIC30F 64TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DSPIC30F6011A-20E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
DSPIC30F6011A-20E/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
dsPIC30F5011/5013
20.2.7
The Fail-Safe Clock Monitor (FSCM) allows the device
to continue to operate even in the event of an oscillator
failure. The FSCM function is enabled by appropriately
programming the FCKSM Configuration bits (clock
switch and monitor selection bits) in the FOSC Device
Configuration register. If the FSCM function is enabled,
the LPRC internal oscillator will run at all times (except
during Sleep mode) and is not subject to control by the
SWDTEN bit.
In the event of an oscillator failure, the FSCM gener-
ates a clock failure trap event and switches the system
clock over to the FRC oscillator. The user then has the
option to either attempt to restart the oscillator or exe-
cute a controlled shutdown. The user may decide to
treat the trap as a warm Reset by simply loading the
Reset address into the oscillator fail trap vector. In this
event, the CF (Clock Fail) Status bit (OSCCON<3>) is
also set whenever a clock failure is recognized.
In the event of a clock failure, the WDT is unaffected
and continues to run on the LPRC clock.
If the oscillator has a very slow start-up time coming out
of POR, BOR or Sleep, it is possible that the PWRT
timer will expire before the oscillator has started. In
such cases, the FSCM is activated and the FSCM initi-
ates a clock failure trap, and the COSC<1:0> bits are
loaded with FRC oscillator selection. This effectively
shuts off the original oscillator that was trying to start.
The user may detect this situation and restart the
oscillator in the clock fail trap ISR.
Upon a clock failure detection, the FSCM module
initiates a clock switch to the FRC oscillator as follows:
1.
2.
3.
For the purpose of clock switching, the clock sources
are sectioned into four groups:
• Primary
• Secondary
• Internal FRC
• Internal LPRC
The user can switch between these functional groups
but cannot switch between options within a group. If the
primary group is selected, then the choice within the
group is always determined by the FPR<3:0>
Configuration bits.
DS70116J-page 142
COSC bits (OSCCON<13:12>) are loaded with
the FRC oscillator selection value.
The CF bit is set (OSCCON<3>).
The OSWEN control bit (OSCCON<0>) is
cleared.
FAIL-SAFE CLOCK MONITOR
The OSCCON register holds the control and status bits
related to clock switching.
• COSC<1:0>: Read-only status bits always reflect
• NOSC<1:0>: Control bits which are written to
• LOCK: The LOCK Status bit indicates a PLL lock.
• CF: Read-only Status bit indicating if a clock fail
• OSWEN: Control bit changes from a ‘0’ to a ‘1’
If Configuration bits FCKSM<1:0> = 1x, the clock
switching and fail-safe clock monitoring functions are
disabled. This is the default Configuration bit setting.
If clock switching is disabled, the FOS<1:0> and
FPR<3:0> bits directly control the oscillator selection
and the COSC<1:0> bits do not control the clock selec-
tion. However, these bits will reflect the clock source
selection.
20.2.8
A write to the OSCCON register is intentionally made
difficult because it controls clock switching and clock
scaling.
To write to the OSCCON low byte, the following code
sequence must be executed without any other
instructions in between:
Byte write is allowed for one instruction cycle. Write the
desired value or use bit manipulation instruction.
To write to the OSCCON high byte, the following
instructions must be executed without any other
instructions in between:
Byte write is allowed for one instruction cycle. Write the
desired value or use bit manipulation instruction.
the current oscillator group in effect.
indicate the new oscillator group of choice.
- On POR and BOR, COSC<1:0> and
detect has occurred.
when a clock transition sequence is initiated.
Clearing the OSWEN control bit will abort a clock
transition in progress (used for hang-up
situations).
Note:
NOSC<1:0> are both loaded with the
Configuration bit values FOS<1:0>.
Byte Write 0x46 to OSCCON low
Byte Write 0x57 to OSCCON low
Byte Write 0x78 to OSCCON high
Byte Write 0x9A to OSCCON high
The application should not attempt to
switch to a clock frequency lower than
100 kHz when the fail-safe clock monitor is
enabled. If such clock switching is
performed, the device may generate an
oscillator fail trap and switch to the Fast
RC oscillator.
PROTECTION AGAINST
ACCIDENTAL WRITES TO OSCCON
© 2011 Microchip Technology Inc.